Considering the premise that the twentieth century was a time of great upheaval in general, including in music, how did this upheaval affect developments in musical styles and genres? Discuss two main isms (styles) that developed as composers rebelled against the emotionalism of the late Romantic period. Briefly define each style. List the major composer(s) of each style, and at least one of their representative compositions.
Your initial post for this discussion should be 150-250 words in length and completely answer the question.